Classic FTP LIST directory traversal

classicftp-list-directory-traversal (43230) The risk level is classified as MediumMedium Risk

Description:

Classic FTP could allow a remote attacker to traverse directories on the system, caused by an error in the FTP client. By persuading a victim to download a directory containing a file with "dot dot" sequences using forward-slash or backslash characters (../ or ..\) in the filename via the LIST command, an attacker could traverse directories and write arbitrary files to the system.

*CVSS:

Base Score: 4.3
  Access Vector: Network
  Access Complexity: Medium
  Authentication: None
  Confidentiality Impact: Partial
  Integrity Impact: None
  Availability Impact: None
 
Temporal Score: 4.1
  Exploitability: High
  Remediation Level: Unavailable
  Report Confidence: Uncorroborated

Consequences:

Gain Access

Remedy:

No remedy available as of July 1, 2014.

References:

  • NCH Software Web site: Classic FTP Website Maintenance Software.
  • vuln.sg Vulnerability Research Advisory 2008-06-20: Classic FTP FTP-Client Directory Traversal Vulnerability.
  • BID-29846: Classic FTP 'LIST' Command Directory Traversal Vulnerability
  • CVE-2008-2894: Directory traversal vulnerability in the FTP client in NCH Software Classic FTP 1.02 for Windows allows remote FTP servers to create or overwrite arbitrary files via a .. (dot dot) in a response to a LIST command, a related issue to CVE-2002-1345.
  • SA30708: Classic FTP Directory Download Directory Traversal Vulnerability

Platforms Affected:

  • NCH Software Classic FTP 1.02

Reported:

Jun 20, 2008

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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